How many batches to run

easyproductionJavaScript

The mixer takes a fixed number of units per batch, and a part-full batch still has to be run.

batchesNeeded(units: int, perBatch: int) → int

Where you start

function batchesNeeded(units, perBatch) {
  
}

Ceiling division in integers: (units + perBatch - 1) / perBatch.

Reference solution in JavaScript

function batchesNeeded(units, perBatch) {
  if (units <= 0 || perBatch <= 0) return 0;
  return Math.floor((units + perBatch - 1) / perBatch);
}